With Transistor Control Means In The Line Circuit Patents (Class 363/89)
  • Patent number: 10742113
    Abstract: The present disclosure provides a control circuit, where the control circuit includes: a signal detection unit, a zero-crossing detection (ZCD) signal acquisition unit, a pulse width modulation (PWM) control signal generation unit, and a signal processing unit; where the signal detection unit, the ZCD signal acquisition unit, the PWM control signal generation unit and the signal processing unit are connected in cascade. The control circuit provided in the present disclosure reduces processing delay of a ZCD signal and improve signal a processing accuracy of a power factor correction (PFC) system.
    Type: Grant
    Filed: September 4, 2019
    Date of Patent: August 11, 2020
    Assignee: DELTA ELECTRONICS (SHANGHAI) CO., LTD.
    Inventors: Kang Guo, Hongyuan Jin, Hongbao Wang
  • Patent number: 10734907
    Abstract: Based on a control voltage outputted by a secondary-side control circuit and a drain voltage of a second transistor that has a drain electrode connected to a primary winding of a transformer and performs switching operations based on a gate voltage, a control voltage generating circuit of a synchronous rectifier circuit generates the gate voltage of a first transistor. The gate voltage turns off the first transistor irrespective of the control voltage at timing where the drain voltage falls from a first value to a second value.
    Type: Grant
    Filed: August 9, 2018
    Date of Patent: August 4, 2020
    Assignee: FUJITSU LIMITED
    Inventor: Tatsuya Hirose
  • Patent number: 10700522
    Abstract: Disclosed are a method and device for processing a voltage drop, a grid interconnection method and device for processing an electrical apparatus, and a system. The method includes: acquiring a drop amplitude of a first voltage for each phase in a three-phase alternating current (S204); and under a condition in which the first voltage for any phase in the three-phase alternating current drops, performing reactive power compensation according to a drop amplitude of the first voltage for a phase in which the first voltage drops (S206). Therefore, the electrical apparatus has a low voltage ride-through function, thereby solving the technical problem of a large deviation of voltage drop amplitude determination arising from an asymmetrical drop of three phases.
    Type: Grant
    Filed: April 11, 2017
    Date of Patent: June 30, 2020
    Assignee: GREE ELECTRIC APPLIANCES, INC. OF ZHUHAI
    Inventors: Weitao Ni, Shiyong Jiang, Xuefen Zhang, Jianhua Li, Hewei Lou, Jing Wang
  • Patent number: 10673344
    Abstract: A switching power supply circuit with synchronous rectifier has an energy storage component, a rectifier switch coupled to a secondary side of the energy storage component, and a secondary side control circuit. The secondary side control circuit provides a driving signal to control the rectifier switch. When the drain-source voltage across the rectifier switch is less than a first threshold value, the secondary side control circuit controls the driving signal to be a maximum voltage to control the rectifier switch being fully on for a predetermined duration. After a predetermined duration, the secondary side control circuit adjusts the voltage of the driving signal based on the drain-source voltage across the rectifier switch and a second threshold value.
    Type: Grant
    Filed: November 19, 2018
    Date of Patent: June 2, 2020
    Assignee: Chengdu Monolithic Power Systems Co., Ltd.
    Inventor: Siran Wang
  • Patent number: 10651754
    Abstract: An AC-DC converter with secondary side controller and synchronous rectifier (SR) architecture and method for operating the same are provided. Generally, the controller is implemented as an integrated circuit including a peak-detector module having a peak comparator with a first input coupled to a drain of the SR through a single SR sense (SR-SNS) pin to receive a sinusoidal input. A sample and hold (S/H) circuit with an input coupled to the SR-SNS pin samples the sinusoidal input and holds on an output of thereof a peak sampled voltage received on the input. A direct current (DC) offset voltage coupled between the output of the S/H circuit and the second input of the peak comparator subtracts an DC offset voltage from the peak sampled voltage to compensate for DC offset inaccuracies introduced by the S/H circuit and the peak comparator. Other embodiments are also disclosed.
    Type: Grant
    Filed: September 23, 2019
    Date of Patent: May 12, 2020
    Assignee: Cypress Semiconductor Corporation
    Inventors: Saravanan Murugesan, Karri Rajesh, Pulkit Shah, Arun Khamesra, Hariom Rai
  • Patent number: 10644601
    Abstract: Various embodiments of the present application are directed towards a buck converter circuit including a controller circuit. In some embodiments, the buck converter circuit includes a first switching device, a second switching device, an inductor, and a controller. The inductor is electrically coupled to a node at which a source/drain terminal of the first switching device and a source/drain terminal of the second switching device are electrically coupled. The controller is configured to alternatingly change the first switching device between ON and OFF, and further configured to alternatingly change the second switching device between ON and OFF. The first switching device is OFF while the second switching device is ON. The first switching device is partially ON immediately before or after the second switching device transitions between ON and OFF.
    Type: Grant
    Filed: April 2, 2019
    Date of Patent: May 5, 2020
    Assignee: Taiwan Semiconductor Manufacturing Co., Ltd.
    Inventors: Chia-Cheng Pao, Chu Fu Chen, Chih-Hua Wang
  • Patent number: 10630197
    Abstract: A power converter circuit includes a rectifier circuit having first and second input terminals that receive an AC input voltage and first and second output terminals that output a DC bus voltage, and a series circuit comprising a switch connected in series with an input capacitor connected across the first and second output terminals. A controller controls the switch so that the switch is on at least during a period when a magnitude of the AC input voltage is less than a selected DC bus voltage, and the switch is off during a period when the magnitude of the AC input voltage is greater than the selected DC bus voltage and less than a peak value of the AC input voltage. Power adapters incorporating these features benefit from low component count, reduced component current stress, reduced size and weight, and low cost, making then suitable for a range of portable devices such as laptop computers and cellphones.
    Type: Grant
    Filed: February 20, 2019
    Date of Patent: April 21, 2020
    Assignee: Queen's University at Kingston
    Inventors: Yang Chen, Yan-Fei Liu
  • Patent number: 10608551
    Abstract: A rectifying element includes a MOS transistor series-connected with a Schottky diode. A bias voltage is applied between the control terminal of the MOS transistor and the terminal of the Schottky diode opposite to the transistor. A pair of the rectifying elements are substituted for diodes of a rectifying bridge circuit. Alternatively, the control terminal bias is supplied from a cross-coupling against the Schottky diodes. In another implementation, the Schottky diodes are omitted and the bias voltage applied to control terminals of the MOS transistors is switched in response to cross-coupled divided source-drain voltages of the MOS transistors. The circuits form components of a power converter.
    Type: Grant
    Filed: August 1, 2018
    Date of Patent: March 31, 2020
    Assignee: STMicroelectronics (Tours) SAS
    Inventor: Frederic Gautier
  • Patent number: 10601308
    Abstract: Provided are a plurality of circuit blocks each including: a first series circuit including a first rectifying element and a first switching element which are connected in series; a second series circuit including a second rectifying element and a second switching element which are connected in series; and a capacitor, wherein output terminals are connected to both ends of the first series circuit, both ends of the second series circuit, and both ends of the capacitor. Input terminals of the respective circuit blocks are connected in series. An AC power source is connected thereto via a choke, thereby solving the problem.
    Type: Grant
    Filed: August 29, 2014
    Date of Patent: March 24, 2020
    Assignee: SHINDENGEN ELECTRIC MANUFACTURING CO., LTD.
    Inventor: Hiroyuki Haga
  • Patent number: 10559974
    Abstract: An electrical system can include a power supply that provides primary power, and a light fixture having at least one light source, where the light fixture is coupled to the power supply, where the at least one light source illuminates when the light fixture receives the primary power. The electrical system can further include an energy storage unit having at least one energy storage device that charges using the primary power. The electrical system can also include a controller that determines an initial charging period during which the at least one energy storage device is charged using a constant supply of the primary power, where the controller changes the constant supply of the primary power to a trickle charge of the primary power at the end of the initial charging period to maintain a minimum charge level of the at least one energy storage device.
    Type: Grant
    Filed: April 20, 2017
    Date of Patent: February 11, 2020
    Assignee: Eaton Intelligent Power Limited
    Inventors: Kevin Odith Porter, Daniel Leland Bragg
  • Patent number: 10560997
    Abstract: A lamp driver for an LED lamp includes a voltage input port which is adapted to connect the lamp driver to a power source. A boost converter circuit is connected to the voltage input port. A voltage output port is adapted for connecting an LED to the lamp driver. A shutdown circuit provides a shutdown signal, which is connected to the voltage input port for detecting an input voltage of the voltage input port and is connected to the boost converter circuit for controlling at least one active component of the boost converter. The shutdown circuit is arranged to shut down the boost converter circuit when a shutdown voltage at the voltage input port is detected. During the shutdown of the boost converter circuit, the voltage output port still provides an operation voltage for the LED.
    Type: Grant
    Filed: September 11, 2018
    Date of Patent: February 11, 2020
    Assignee: LEDVANCE GMBH
    Inventors: Yongchang Dai, Xiaoming Fu, Xiangyin Hao, Kun Xiong
  • Patent number: 10496154
    Abstract: An active noise cancelling power supply to perform active noise cancelling of input power with noise to output power. The active noise cancelling power supply having a power transformation device receiving input power and converting the power to a voltage signal with a ripple. The active noise cancelling power supply has a ripple measuring device, which measures the ripple as the voltage signal with a ripple passes through the ripple measuring device producing a ripple signal. A controller with a data storage in communication with a processor, wherein computer instructions in the data storage are configured to instruct the processor to produce a first noise cancellation signal in volts or millivolts out of phase with the ripple signal and inject the first noise cancellation signal on the voltage signal with a ripple at a node forming a clean signal as output power.
    Type: Grant
    Filed: February 24, 2017
    Date of Patent: December 3, 2019
    Assignee: DEAN TECHNOLOGY, INC.
    Inventors: Lynn Edward Roszel, Craig Sean Dean, Scott Richard Wilson, Erik Steven Haugarth, Jan Simon Reuning
  • Patent number: 10498223
    Abstract: A power supply circuit includes: an alternating current-to-direct current (AC-to-DC) converter, a transformer, a first current switch, a switch control circuit and a power factor enhancement circuit. The AC-to-DC converter converts an AC power signal into a DC power signal. The transformer includes a primary side and a secondary side, where a first terminal of the primary side is coupled to the AC-to-DC converter, a second terminal of the secondary side is coupled to a ground voltage level, a first terminal of the first current switch is coupled to a second terminal of the primary side, and a second terminal of the first current switch is coupled to the ground voltage level through an impedance component. The power factor enhancement circuit selectively adjusts a zero current detection voltage to make the switch control circuit set the first current switch to be in a conducting state.
    Type: Grant
    Filed: March 31, 2019
    Date of Patent: December 3, 2019
    Assignee: ACER INCORPORATED
    Inventor: Tzu-Tseng Chan
  • Patent number: 10498258
    Abstract: A modular multi-level power converter device including an AC output, including a modular multi-level DC/AC converter including a plurality of arms in parallel, ends of which define input terminals, each arm including two lines of modules in series, each switching module including a pair of switches in series, mounted on terminals of an energy-storage device, the DC/AC converter adjusting frequency at an output of the converter device. The device further includes a converter including a DC output, including two output terminals connected to the input terminals of the DC/AC converter, the converter including a DC output adjusting amplitude at an output of the converter device, the DC/AC converter further including a mechanism controlling the switches of the modules, which apply a full-wave command to the switches during at least one time interval, the modules of a single line being in a same state simultaneously.
    Type: Grant
    Filed: April 15, 2016
    Date of Patent: December 3, 2019
    Assignee: SCHNEIDER TOSHIBA INVERTER EUROPE SAS
    Inventors: Jean-Paul Lavieville, Cong Martin Wu
  • Patent number: 10491136
    Abstract: An electric power conversion device has an electric power converter and a control device. The control device adjusts an output voltage of the electric power converter to approach a first current flowing a first drive switch to an instruction current during a first period in which an input voltage supplied from an AC power source has a positive polarity, and adjusts the output voltage of the electric power converter to approach a second current flowing a second drive switch to the instruction current during a second period in which the input voltage supplied from the AC power source has a negative polarity. The control device operates a switch arranged in a second current sensor during the first period, and operates a switch arranged in a first current sensor during the second period.
    Type: Grant
    Filed: September 26, 2018
    Date of Patent: November 26, 2019
    Assignee: DENSO CORPORATION
    Inventors: Seiji Iyasu, Yuji Hayashi, Yuichi Handa
  • Patent number: 10474178
    Abstract: A power module is a power module having a PFC (power factor correction) function. The power module includes: IGBTs in a pair; first diodes in a pair connected to the IGBTs in a pair, the first diodes forming a reverse-conducting element; and second diodes in a pair connected to the IGBTs in a pair, the second diodes having a rectifying function. The power module further includes a driving IC that drives the IGBTs in a pair, and P terminals in a pair provided independently of each other. The P terminals are connected to one ends of the first diodes in a pair, respectively, the one ends being opposite to the other ends of the first diodes to which the IGBTs in a pair are connected.
    Type: Grant
    Filed: December 26, 2012
    Date of Patent: November 12, 2019
    Assignee: Mitsubishi Electric Corporation
    Inventor: Masahiro Kato
  • Patent number: 10461628
    Abstract: The present disclosure provides a control circuit and a control method, where the control circuit includes: a signal detection unit, a ZCD signal acquisition unit, a signal selection unit, a frequency limiting unit, and a PWM control signal generation unit; where the signal detection unit, the ZCD signal acquisition unit, the signal selection unit, the frequency limiting unit, and the PWM control signal generation unit are connected in cascade. The control circuit and the control method provided in the present disclosure reduce processing delay of a ZCD signal and improve signal processing accuracy of a PFC system.
    Type: Grant
    Filed: December 24, 2018
    Date of Patent: October 29, 2019
    Assignee: DELTA ELECTRONICS, INC.
    Inventors: Hongbao Wang, Yanling Zong, Liangliang Ren, Dezhi Jiao, Jinfa Zhang
  • Patent number: 10461632
    Abstract: Bridgeless PFC converters. Example embodiments are methods of operating a power converter including operating the power converter during a positive half-line cycle of an alternating current (AC) source by: charging an inductance through a low-side switch with a first charging current having a first polarity; measuring the first charging current using a low-side current transformer (CT), while shorting a secondary winding of a high-side CT; and discharging the inductance through a high-side switch with a first discharging current having the first polarity. Operating the power converter during a negative half-line cycle of the AC source by: charging the inductance through the high-side switch with a second charging current having a second polarity; measuring the second charging current using the high-side CT, while shorting a secondary winding of the low-side CT; and discharging the inductance through the low-side switch with a second discharging current having the second polarity.
    Type: Grant
    Filed: April 3, 2019
    Date of Patent: October 29, 2019
    Assignee: SEMICONDUCTOR COMPONENTS INDUSTRIES, LLC
    Inventors: Nikhilesh S. Kamath, Armando Gabriel Mesa, Ajay Karthik Hari
  • Patent number: 10439510
    Abstract: In an example embodiment, an apparatus includes a bridge rectifier circuit having branches between the AC and DC nodes formed by a set of transistors. A load current measurement circuit includes a current-controlled current source coupled to the bridge rectifier circuit. The current control current source is configured to generate a mirrored current that is a scaled version of a current through at least one of the set of transistors. A current integration circuit is configured to integrate the mirrored current by charging a capacitor with the scaled current in a first mode and discharging the capacitor in a second mode. A sample and hold circuit is configured to set an output node to a voltage equal to a voltage stored by the capacitor in response to the current integration circuit entering the second mode and prior to the discharge of the capacitor.
    Type: Grant
    Filed: March 14, 2017
    Date of Patent: October 8, 2019
    Assignee: NXP B.V.
    Inventors: Peter Christiaans, Robert Glenn Crosby, II, Fu Chun Zhan
  • Patent number: 10439504
    Abstract: A power converter device includes: a rectifier configured to convert AC power into DC power based on a PWM control signal; a voltage detecting unit configured to detect a voltage of a smoothing capacitor that is connected on a DC side of the rectifier; a capacitance estimating unit configured to estimate capacitance of the smoothing capacitor; a voltage control unit configured to calculate a voltage loop gain from the estimated capacitance and generate a control voltage from the voltage loop gain and an error between a command voltage and the detected voltage; and a PWM control unit configured to generate the PWM control signal by using the control voltage and control the rectifier.
    Type: Grant
    Filed: March 7, 2019
    Date of Patent: October 8, 2019
    Assignee: FANUC CORPORATION
    Inventor: Shunpei Tanaka
  • Patent number: 10397998
    Abstract: A driver circuit has a driver unit (50) which provides a current for the load (51) based on an input voltage (10) comprising first and second terminals (10a, 10b). The driver unit (50) comprises a linear driver which comprises a current regulating element (Q3) between the input and the load, said element having a controllable resistive characteristic. A compensation unit (52) in series with the driver unit (50) and the input voltage provides a compensating voltage. This is used to control the voltage across the driver unit in dependence on the input voltage and operating conditions of the load. The compensation unit (52) comprises a switch mode power converter and a second capacitor (C2) as an energy source of the switch mode power converter, with the current regulating element (Q3), the load (51) and the second capacitor (C2) in series connection between the first and second terminals (10a, 10b).
    Type: Grant
    Filed: November 9, 2015
    Date of Patent: August 27, 2019
    Assignee: SIGNIFY HOLDING B.V.
    Inventors: Priya Ranjan Mishra, Rakeshbabu Panguloori
  • Patent number: 10348440
    Abstract: In order to provide a power supply path-switching device, a power supply path-switching system, and a power supply path-switching method with which it is possible to utilize to the maximum equipment in which a failure has not occurred without imparting a power supply function to a branch station side even when a failure has occurred in the power supply function of the trunk station side, a power supply path-switching device (10) is provided with a first switching means (20), a second switching means (30), a grounding means (40), and a power consumption circuit (50) that operates by being supplied with the power supply. When a failure occurs in a first power supply line (61), the power consumption circuit (50) grounds the first power supply line (61), one end of the power consumption circuit (50) being connected to the grounding means (40) and a second power supply line (62) being connected to the other end of the power consumption circuit (50).
    Type: Grant
    Filed: May 9, 2016
    Date of Patent: July 9, 2019
    Assignee: NEC CORPORATION
    Inventor: Ryuji Aida
  • Patent number: 10291109
    Abstract: Critical-mode soft-switching techniques for a power converter are described. In one example, a power converter includes a converter electrically coupled between an alternating current (AC) power system and a direct current (DC) power system, where the converter includes a number of phase legs. The power converter can also include a control system configured, during a portion of a whole line cycle of the AC power system, to clamp a first phase leg of the converter from switching and operate second and third phase legs of the converter independently in either critical conduction mode (CRM) or in discontinuous conduction mode (DCM).
    Type: Grant
    Filed: January 11, 2018
    Date of Patent: May 14, 2019
    Assignee: VIRGINIA TECH INTELLECTUAL PROPERTIES, INC.
    Inventors: Zhengrong Huang, Zhengyang Liu, Fred C. Lee, Qiang Li, Furong Xiao
  • Patent number: 10230303
    Abstract: An isolated switching power converter is provided wherein a secondary side is valley mode switched to transmit data to a primary side. This provides secondary side regulation without the need for an optocoupler. Data communication between the primary and secondary sides of switching power converters is presented.
    Type: Grant
    Filed: May 15, 2017
    Date of Patent: March 12, 2019
    Assignee: Dialog Semiconductor, Inc.
    Inventors: Andrey Malinin, John Kesterson
  • Patent number: 10160337
    Abstract: A low voltage DC-DC converter of an eco-friendly vehicle is provided. The converter includes an output current limit map applier that is configured to output an output current limit value using an output current limit map. A power controller is configured to amplify the output limit value output from the output current limit map applier to a predefined gain. Furthermore, an output limiter is configured to output the output limit value output from the power controller, and filter and output the output limit value after a predefined time lapses.
    Type: Grant
    Filed: June 27, 2016
    Date of Patent: December 25, 2018
    Assignees: Hyundai Motor Company, Kia Motors Corporation
    Inventors: Jee Heon Kim, Dong Jun Lee, Gi Bong Son, Won Kyoung Choi, Hyun Wook Seong
  • Patent number: 10164548
    Abstract: A power rectifier rectifies alternating electric current by using a controller in the power rectifier to control a first delay circuit in the power rectifier to turn on a high side switch in the power rectifier, wherein the high side switch provides a path for power from an input voltage line of the power rectifier to an output voltage line of the power rectifier. The controller controls a second delay circuit in the power rectifier to maintain the high side switch in an on state to change a switching state of the high side switch based on detection, by a current inversion detector, of a current inversion associated with the input and output voltage lines of the power rectifier.
    Type: Grant
    Filed: June 30, 2016
    Date of Patent: December 25, 2018
    Assignee: Marvell World Trade Ltd.
    Inventors: Giuseppe De Vita, Alessandro Savo, Luca Collamati, Maurizio Costagliola
  • Patent number: 10146243
    Abstract: A method for controlling a power factor correction circuit includes: sensing, by a control unit, an input signal; deriving, by the control unit, a delay correction input signal using the input signal and a previous input signal that is sensed before the input signal; and controlling, by the control unit, the power factor correction circuit using the derived delay correction input signal.
    Type: Grant
    Filed: November 15, 2016
    Date of Patent: December 4, 2018
    Assignee: Hyundai Motor Company
    Inventors: Hui Sung Jang, Hyung Bin Ihm, Gi Bong Son, Hyun Wook Seong, Gyu Tae Choi
  • Patent number: 10135349
    Abstract: A power supply device includes a first voltage conversion unit and a second voltage conversion unit. The first voltage conversion unit performs a step-down operation according to a first voltage to output a first output voltage via a first connection interface. The second voltage conversion unit includes a first rectifying circuit and a power delivery circuit. The first rectifying circuit performs a first rectifying operation based on load information of a load and the first voltage to generate a second voltage. The power delivery circuit determines, according to the load information and the second voltage, whether to output the second voltage as a second output voltage to the load via a second connection interface. The first connection interface is different from the second connection interface, and the second output voltage is higher than or equal to the first output voltage.
    Type: Grant
    Filed: January 9, 2017
    Date of Patent: November 20, 2018
    Assignee: CHICONY POWER TECHNOLOGY CO., LTD.
    Inventors: Shun-Hsu Yang, Lyu-Jhih Wang
  • Patent number: 10104729
    Abstract: The invention provides a driver circuit for driving an LED arrangement which uses a switch mode power converter, for example a flyback ringing choke converter, which comprises a main switch (e.g. bipolar transistor) and a sub-circuit for generating a current for the control terminal of the main switch. The sub-circuit in some examples makes use of an auxiliary winding as a voltage supply, and further comprises a ramp circuit for generating a ramp voltage from the voltage supply and a voltage follower, such as a control transistor, connected between the voltage supply and the control input of the main switch. By ramping up the current of the main switch, the losses arising as a result of the current flowing to the control input of the main switch are reduced. One set of examples makes use of a flyback ringing choke converter, which enables low cost implementation and good efficiency. The driver is able to receive a wide range of input voltages, by ensuring that the power loss is kept low.
    Type: Grant
    Filed: May 25, 2016
    Date of Patent: October 16, 2018
    Assignee: PHILIPS LIGHTING HOLDING B.V.
    Inventors: Hui Zhang, Dennis Johannes Antonius Claessens
  • Patent number: 10103645
    Abstract: This power converter is provided with: three clusters (CLu, CLv, CLw) in which unit cells are cascade-connected; and power supplies of the same kind which are respectively connected to one end of each of the three clusters. Terminals of the three clusters at the side not connected to the power supplies are respectively connected to other ends of the power supplies connected to the other clusters to form a delta-connection configuration. Three connections of the delta-connection configuration are respectively connected to each of the U, V, and W phases of a three-phase alternating current, and power conversion between the power supplies and the three-phase AC is enabled. If DC power supplies (Vdcu, Vdcv, Vdcw) are employed as the power supplies, power conversion between the DC power supplies and the three-phase AC power supplies can be performed.
    Type: Grant
    Filed: March 17, 2015
    Date of Patent: October 16, 2018
    Assignee: TOKYO INSTITUTE OF TECHNOLOGY
    Inventors: Hirofumi Akagi, Makoto Hagiwara
  • Patent number: 10069403
    Abstract: A power supply includes a PFC (power factor correction) circuit, an LLC converter and a controller. The controller is operable to burst the LLC converter for a predefined burst on-time and at a default frequency when the power supply is in a low power standby mode, and adjust the frequency at which the LLC converter is switched during the predefined burst on-time based on load conditions and an input voltage to the LLC converter.
    Type: Grant
    Filed: June 6, 2017
    Date of Patent: September 4, 2018
    Assignee: Infineon Technologies Austria AG
    Inventors: Shu Fan Lim, Dong Li
  • Patent number: 10063154
    Abstract: A power conversion circuit including an SR MOSFET is provided. A minimum off-time timer for the SR MOSFET is started. A voltage potential at a first terminal of the SR MOSFET is measured. The SR MOSFET is turned on after a rate of change over time of the voltage potential exceeds a first threshold and before the minimum off-time timer expires.
    Type: Grant
    Filed: April 29, 2016
    Date of Patent: August 28, 2018
    Assignee: Semiconductor Components Industries, LLC
    Inventors: Karel Ptacek, Tomas Tichy
  • Patent number: 10057947
    Abstract: A power supply system for illuminating an LED lamp unit, having a normal mode of operation in which a mains input of a driver of the LED lamp unit is supplied by mains power, and an emergency mode of operation, in which the LED lamp unit is supplied by a charge storage device, is disclosed. The system includes an emergency mode converter operable to step-up the voltage from the charge storage device and to supply the mains driver input for illuminating the LED lamp unit.
    Type: Grant
    Filed: April 12, 2017
    Date of Patent: August 21, 2018
    Assignee: TRIDONIC UK LTD
    Inventor: Ian Wilson
  • Patent number: 10027244
    Abstract: A power conditioning unit used in an electrical system. The power conditioning unit includes a positive bus and a negative bus that are electrically connected to a direct current load to enable supplying direct current electrical power to the direct current load; and a first phase leg, which includes a first diode electrically connected to the positive bus, a first transistor electrically connected to the negative bus, and a first node between the first diode and the first transistor. The first node is electrically connected to an alternating current power source to enable the first phase leg to receive a first phase of alternating current electrical power from the alternating current power source and the first transistor opens and closes to control flow of the first phase through the first phase leg to facilitate generating the direct current electrical power at a target voltage using the alternating current electrical power.
    Type: Grant
    Filed: June 21, 2016
    Date of Patent: July 17, 2018
    Assignee: GENERAL ELECTRIC COMPANY
    Inventors: Yash Veer Singh, Arvind Kumar Tiwari, Scott Brian Wright, Kapil Jha
  • Patent number: 10027113
    Abstract: A high-voltage DC voltage unit with a first DC voltage apparatus providing a first high-voltage DC voltage between a first output connection and a second output connection of the DC voltage apparatus or can be fed with a first high-voltage DC voltage. A second DC voltage apparatus provides a second high-voltage DC voltage or can be fed with a second high-voltage DC voltage. A first DC voltage connection is coupled with the first output connection of the first DC voltage apparatus. A second DC voltage connection is coupled with the second output connection of the second DC voltage apparatus. A reference potential connection is coupled with the second output connection of the first DC voltage apparatus, with the first output connection of the second DC voltage apparatus and with an earth potential, the first and second high-voltage DC voltages realizing a bipolar power supply.
    Type: Grant
    Filed: May 21, 2014
    Date of Patent: July 17, 2018
    Assignees: Airbus Operations GmbH, Airbus Defence and Space GmbH
    Inventors: Joerg Wangemann, Jens Schult
  • Patent number: 10014788
    Abstract: The present application relates to the field of switching power supplies and in particular to switching power supplies in which a primary side is isolated from the secondary side and in which a synchronous rectifier on the secondary side is controlled from the primary side. The application provides a method for minimizing body diode conduction losses.
    Type: Grant
    Filed: March 14, 2014
    Date of Patent: July 3, 2018
    Assignee: Icergi Limited
    Inventor: George Young
  • Patent number: 10008940
    Abstract: A power supply device includes: a memory; and a processor coupled to the memory and the processor configured to: determine a duty ratio of a control signal of a switching element in a power supply circuit so that an output voltage of the power supply circuit approaches a target voltage; compute an acceptable range of a duty ratio based on an output current of the power supply circuit detected by a current detecting circuit; output the duty ratio when the duty ratio is inside the acceptable range; and stop the power supply circuit when the duty ratio is outside the acceptable range.
    Type: Grant
    Filed: October 17, 2016
    Date of Patent: June 26, 2018
    Assignee: FUJITSU LIMITED
    Inventors: Takahiko Sugawara, Yu Yonezawa, Hiroshi Nakao, Yoshiyasu Nakashima
  • Patent number: 9998113
    Abstract: A voltage dividing circuit includes a first register that is supplied with an input voltage and a second resistor, and divides the input voltage to generate a divided voltage. A detection circuit compares the divided voltage with a brown-in detection threshold value, and outputs a first detection signal of H level when the divided voltage is equal to or higher than the threshold value, and outputs the first detection signal of L level when the divided voltage is lower than the threshold value. A brown-in timer outputs a second detection signal after a first predetermined time has elapsed since the time point of the first detection signal. A latch circuit latches an output from the detection circuit in response to the second detection signal. A logical element at least performs logical AND operation of an output of the latch circuit and a PWM signal.
    Type: Grant
    Filed: June 8, 2016
    Date of Patent: June 12, 2018
    Assignee: FUJI ELECTRIC CO., LTD.
    Inventor: Masanari Fujii
  • Patent number: 9985540
    Abstract: An isolated fly-buck converter is provided for converting an input voltage to an output voltage, and for generating a voltage indicative of the input voltage. The isolated fly-buck converter comprises on its secondary side an input voltage sensing circuit for generating the voltage indicative of the input voltage, the input voltage sensing circuit comprising a capacitive element and a rectifying element connected in series. The input voltage sensing circuit is connected across a secondary winding of the isolated fly-buck converter such that the rectifying element prevents current from flowing through the input voltage sensing circuit during the fly-buck phase of operation of the converter.
    Type: Grant
    Filed: February 18, 2016
    Date of Patent: May 29, 2018
    Assignee: Telefonaktiebolaget LM Ericsson (publ)
    Inventors: Magnus Karlsson, Oscar Persson
  • Patent number: 9985518
    Abstract: A circuit includes: a signal processing unit which is configured to perform signal processing; an amplifying unit which is configured to amplify a signal output from the signal processing unit; a first power supplying path which is extended from a battery to the signal processing unit; a second power supplying path which is branched from the first power supplying path, and which is extended to the amplifying unit; a power limiting unit which is provided in the second power supplying path, and which is configured to limit power flowing in the second power supplying path; and a capacitor which is connected to the second power supplying path, and which is configured to supplement power to be supplied to the amplifying unit.
    Type: Grant
    Filed: January 19, 2017
    Date of Patent: May 29, 2018
    Assignee: YAMAHA CORPORATION
    Inventors: Jun Ishii, Satsuki Kawahashi, Takeshi Kono, Yoshiyuki Harada
  • Patent number: 9973097
    Abstract: A power supply system and related method for providing a regulated DC output from an unregulated AC input includes a Vienna rectifier having power factor correction circuitry and a series resonant DC to DC converter to provide a regulated DC output. The power supply system further includes one or more compensator circuits coupled in feedback configuration to control the Vienna rectifier and/or the DC to DC converter and avoid a potentially dangerous over-voltage condition at the regulated DC output.
    Type: Grant
    Filed: June 21, 2016
    Date of Patent: May 15, 2018
    Assignee: Astronics Advanced Electronic Systems Corp.
    Inventor: Warren J. Wambsganss
  • Patent number: 9973091
    Abstract: A switched mode power supply, in some embodiments, comprises a synchronous rectification transistor switch including a gate, and it further comprises an output driver coupled to the gate and providing a driving signal to the gate. The driving signal is determined based on a dynamically controllable clamp signal and a prior driving signal.
    Type: Grant
    Filed: January 14, 2015
    Date of Patent: May 15, 2018
    Assignee: SEMICONDUCTOR COMPONENTS INDUSTRIES, LLC
    Inventors: Karel Ptacek, Tomas Tichy
  • Patent number: 9948186
    Abstract: Described is an apparatus which comprises: a first bridge to be coupled to a first load; a first Pulse Width Modulation (PWM) circuit to drive the first bridge; a second bridge to be coupled to a second load; and a second PWM circuit to drive the second bridge, wherein the first PWM circuit is controlled by a first digital word separate from a second digital word, wherein the second PWM circuit is controlled by the second digital, and wherein the second digital word is derived from the first digital word.
    Type: Grant
    Filed: June 21, 2016
    Date of Patent: April 17, 2018
    Assignee: INTEL CORPORATION
    Inventors: Nicholas P. Cowley, Harish K. Krishnamurthy, Ruchir Saraswat
  • Patent number: 9917505
    Abstract: Systems, apparatuses, and techniques for pulse width modulation (PWM) are described. A described system includes a circuit that contains an inductor and a transistor that controls current through the inductor based on a PWM signal to produce an output; and a controller to provide the PWM signal, which includes PWM cycles that include on-durations and off-durations. The controller can receive a first signal indicating an input voltage that is applied to the inductor, receive a second signal indicating a current through the inductor, use an on-duration parameter value to control the on-duration, determine a maximum off-duration of the off-durations corresponding to the PWM cycles occurring within a first voltage cycle, the first voltage cycle being defined between two consecutive zero-crossing events as indicated by the first signal, and adjust the on-duration parameter value for a second, subsequent voltage cycle based on the maximum off-duration to regulate the output voltage.
    Type: Grant
    Filed: September 8, 2016
    Date of Patent: March 13, 2018
    Assignee: Atmel Corporation
    Inventor: Karl Jean-Paul Courtel
  • Patent number: 9913332
    Abstract: A two-channel LED driver adopts one power stage to provide a constant drive current to drive a first channel LED and a second channel LED, and to provide a power supply voltages to power a smart module. The two-channel LED driver controls the total current flowing through the first channel LED and the second channel LED according to a first dimming signal input by users through the smart module, and controls the dimming ratio between the two channels according to a second dimming signal. The two-channel LED driver provides high performance with simple circuit structure.
    Type: Grant
    Filed: June 21, 2017
    Date of Patent: March 6, 2018
    Assignee: Chengdu Monolithic Power Systems Co., Ltd.
    Inventors: Naixing Kuang, Kai Wang
  • Patent number: 9887642
    Abstract: An inverter output current passes from an inverter phase output, through a non-linear inverter side inductor, and into a line that connects through a grid side inductor to a grid phase. An inductance of the inverter side non-linear inductor is estimated, a current passing through the grid side inductor is estimated, and a current through the inverter side inductor is measured. An inverter feeding the inverter output is controlled using a weighted average of the estimated current through the grid side inductor and the inverter side inductor current measurement, applying a weighting using the estimated inductance.
    Type: Grant
    Filed: May 3, 2017
    Date of Patent: February 6, 2018
    Inventors: Hossein Safamehr, Tooraj Abbasian Najafabadi, Farzad Rajaei Salmasi
  • Patent number: 9871386
    Abstract: Aspects of the subject disclosure may include, for example, a power receiving unit having a wireless power receiver configured to receive a wireless power signal from a power transmitting unit. A rectifier includes a plurality of switching circuits configured to generate a rectified voltage from the wireless power signal, based on switch control signals that include a switch-on signal and a switch-off signal for corresponding ones of the plurality of switching circuits. A rectifier control circuit generates the switch control signals based on predicted switching delays. Other embodiments are disclosed.
    Type: Grant
    Filed: November 30, 2015
    Date of Patent: January 16, 2018
    Assignee: AVAGO TECHNOLOGIES GENERAL IP (SINGAPORE) PTE. LTD
    Inventors: Ryan Michael Desrosiers, Mark David Rutherford, John Stuart Walley, Vadim Bishtein, Angel Arturo Polo
  • Patent number: 9866101
    Abstract: The invention relates to methods for supplying current to an auxiliary power supply for the control circuit of a switching regulator. The auxiliary power supply is connected in parallel to a first switch of the switching regulator. The auxiliary power supply comprises a second switch. During the nonswitching stage of the switching regulator, the second switch has significant impedance so as to power up the auxiliary power supply gradually and to suppress the flow of large or oscillatory currents which may cause damage or create interference. During the switching stage of the switching regulator, the second switch has negligible impedance so as to avoid undue dissipation within the path for the supply of current.
    Type: Grant
    Filed: December 30, 2015
    Date of Patent: January 9, 2018
    Assignee: Microchip Technology Inc.
    Inventors: Marc Tan, Alexander Mednik, Simon Krugly, Wilson Wai-Sum Chan
  • Patent number: 9859788
    Abstract: When a standby signal is High, a Comp_stb signal that is overlapped with an AC waveform is output from an AC-COMP combining circuit in a COMP signal changing circuit, input into a PWM.comp, and compared with an output waveform of a ramp oscillator. Here, only when a peak of the Comp_stb signal is higher than a minimum voltage of the ramp oscillator is an OUT terminal output signal output from a control IC and a burst operation is performed. When the Comp_stb signal is lower than the minimum voltage of the ramp oscillator, the OUT terminal output signal is not output from the control IC because a reset signal of an RSFF remains High. Accordingly, a switching loss is reduced by operating a switching element in a burst mode when a switching power supply apparatus is in a lightly loaded or unloaded state.
    Type: Grant
    Filed: May 20, 2016
    Date of Patent: January 2, 2018
    Assignee: FUJI ELECTRIC CO., LTD.
    Inventor: Hiroshi Maruyama
  • Patent number: RE47005
    Abstract: A circuit for generating an output voltage to a top node of a plurality of LED strings. The circuit includes an inductor having a load current flowing therethrough and a switching transistor responsive to a switching control signal. An integrator generates a compensation voltage responsive to a voltage at a bottom node of the LED string and a reference voltage. Circuitry for combining an a correction offset with the compensation voltage is responsive to the compensation voltage and the load current through the inductor. The offset is generated only during a step load change of the load current and substantially reduces voltage transients from the compensation voltage and the output voltage. A summation circuit sums the compensation voltage including the correction offset with at least the voltage at the bottom node of the LED string to generate a first control signal. A latch generates the switching control signal responsive to the first control signal and a leading edge blanking signal.
    Type: Grant
    Filed: April 16, 2015
    Date of Patent: August 21, 2018
    Assignee: INTERSIL AMERICAS LLC
    Inventors: Nicholas Ian Archibald, Allan Richard Warrington